Re: Another lower seal question

[frankr]

I guess the best I can do is my own personal opinion, because I’ve never seen anything official on it. But I always used the quad rings in the carbon seal on 18hp-up through the Big Twins. Figured it couldn’t hurt. As for the smaller ones like 5.5/7.5hp I’d say the o-ring should be good enough. Once installed and located in place it doesn’t have to slide up and down on the shaft on those. Where most people screw up on those is failure to replace both the o-ring and gasket above the plate.